Uri haskin



(No Model.)

U. HASKIN.

FRICTION CLUTCH. No. 265,496. Patented 001;.3, 1882.

M11 ESEES- V i I V '1 40 q Ell u UNiTED STATES URI HASKIN, OF PITTSBURG,PENNSYLVANIA, ASSIGNOR OF ONE-HALF T ATLAS WORKS, (LIMITED,) OF SAMEPLACE.

FRICTION-CLUTCH.

SPECIFICATION forming part of Letters Patent No. 265,496, dated Cctober3, 1882,

Application filed November 25, 1881. Renewtd September 14, 1882. (Nomodel.)

To all whom it may concern:

Be it known that I, URI HASKIN, of Pittsburg, in the county of Alleghenyand State of Pennsylvania, have invented a new and useful Improvement inFriction-Clutches; and 1 do hereby declare the following to be a full,clear, and exact description thereof.

Myinvention relates to that class of frictionclutches illustrated by myformer patent, N0.

[0 228,893, of June 15, 1880, in which there is, in

combination with an ordinary clutch, a friction-clutch, the saidfriction-clutch being first thrown into gear for the purpose ofestablishing a gradual connection between the shafts,

I5 and thereby taking off the sudden stripping strain from the teeth ofthe ordinary gearclutch.

My present invention consists of an improved construction of such acombined friction and gear clutch.

To enable others skilled in the art to make and use my invention, I willnow describe it by reference to the accompanying drawings, in which-Figure l is a longitudinal section, showing the construction of myimproved apparatus. Figs. 2 and 3 are end views of the engaging parts ofthe gear-clutch, and Fig. 4 is a step or shoe upon which thefriction-clutch rests.

The two shafts are indicated at a and b. Upon the end of the shaft a isa head, 0, which is rigidly secured thereto by keys or other means. .Tothis head is secured by bolts 0 a lateral flange-piece, c, the innersurface of 5 which is beveled, as at 0 so as to form a tapered cavity, 0v

()n theinner side of the head 0, and arranged radially around the centerof the same,are two or more lugs, it, having recesses n between them forthe reception of the projections of the clutch, the said lugs n enteringthe recesses of the clutch when the latter is thrown into gear.

()n the end of the shaft 1) is a sliding head,

5 (1, having a flange, d, bolted to it. The dianieter of the peripheryof the flange cl is less than the diameter of the corresponding part, c,on the head 0, and its outer surface is beveled, as at (1 so as to giveit the shape of a truncated cone. The bevel of the part (1 corre- 5osponds to the internal bevel of the part 0, so that when the slidinghead (I is thrown forward the cone-piece (1 will enter within theconical cavity 0 and the beveled surfaces of the two parts he broughttogether. This constitutes the friction-clutch portion of. my device.The head at ismoved backward and forward on the shaft 11 by means of abifurcated lever, g, of the usual construction, the arms of which fitinto tl e groove d". To prevent the end of the shaft 0 sagging under theweightof the head (I, I rest the latter upon an adjustable shoe or step,70, which is of a curved form and mounted on screw-stems L by means ofthe threaded boxes m. The shoe, being adjusted to a proper height withrelation to the head 0, supports the head (I in position and preventsthe sagging of the shaft 1).

On the shaft 1), back of the sliding head 01, is a sliding collar, 0,which is connected by headed bolts h, passing through the head d, with aclutchnl, on the end of the shaft 0. The clutch i slides freely upon theshaft 1), and is provided with radial projections i and recesses icorresponding with the projections a and recesses n on the inner surfaceof the head 0. The heads h of the bolts are secured in the collar 0 incorrespondingly-shaped recesses, the collar 0 being made in two halves,which are bolted together around the shaft I) and over the heads of thebolts. The front ends of the bolts it screw into the rear end of theclutchi, and are thereby adjustable to fix the relative movements of thehead (Z and clutch i. ward on the shaft 1) by means of a bifurcatedlever, f, of the usual construction, which lever has no other control ofthe collar 0, and cannot therefore be made to withdraw the positiveclutch i.

The operation of my improved device is as follows: hen it is desired tomake the connection between the power and other shafts the head (1 isthrown forward until its beveled surface (1 comes into contact with thebevel c 5 of the head 0, and as this contact becomes closer the motionof the head 0 is imparted to the shaft 1), and then the sliding collar 0is The sliding collar 0 is operated for- 8 thrown forward until theclutch is properly engaged with the projections it upon the innersurface of the head a. This requires the separate movement of the head(I and collar 6; but when the clutch is thrown out ofg'ear the head (Iis moved back and carries before it the collar c, and thereby the clutchi, thus requiring but one movement in uncoupling. The collar 0 is thrownforward by a bifurcated lever, f, the ends of which bear against therear side of the collar. This lever being unable to withdraw the collar,and thereby the clutch, this must be done by the retraction of the head(I. In this vay I prevent careless workmen from throwing back thegear-clutch only and leaving the friction-clutch in contact. I have eX-perienced this ditliculty, and have had several friction-clutches wornaway by this cause.

The flanges d/and 0 are separate pieces from their heads and boltedthereto. This simplifies the manufacture and enables them to be changedwhen worn.

The arrangement of the friction-clutch outside of the geanclutch enablesme to increase the friction-surface to any desired extent, and therebyits power correspondingly, while the efficiency of the gear-clutchremains unimpaired. I

The use ofthe beveled friction-flanges enables me to'get a firmer holdwith less power than can be obtained with plain friction-surfacesstanding at right angles to the shaft and requiring a square thrust uponeach other. Making the beveled friction-surfaces on the peripheryorsimilar part of the wheels or heads increases the area of suchsurfaces and gains power. Itis apparent that the externally-beveledflange may be arranged on the stationary head I; and theinternally-beveled flange on the reciprocating head (I. if desired,without departing from my invention.

I am aware that a friction clutch and gearclutch have heretofore beencombined and mounted on the same shaft, each provided with a lever bymeans of which it could be moved both into and out of gearindependently, and do not herein claim the same, for the reason that ifthe lever has positive control over the gear-clutch in both directionsthere is a constant liability'ot the operator disconnecting thegear-clutch without at the same time withdrawing the frictionclutch,thus bringing unnecessary wear on thet'rictionclutch and hast ening itsdestruction.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. In a friction-clutch,.the combination of twoheads havingattachableperipheral flanges provided with beveled friction-surfaces,substantially as and for the purposes described.

2. The combination of the gearclutclnadjustably connected to itsoperative collar, and the sliding head mounted on the same shat'tbetween said clutch and collar, substantially as and for the purposesdescribed.

3. The sliding head, in combination with its supporting'shoe,substantially as and for the purposes described.

4. A combined friction and gearclutch having reciprocating friction andgear parts mounted on tl1esan1eshaft,in combination with a lever adaptedto operate the friction-clutch both into and out of gear, and a leveradapted to move the gear-clutch into gear only, whereby the gear-clutchcannot be disconnected independently ofthefriction-clutch,substantiallyas and for the purpose specified.

In testimony whereot'l have hereunto set my hand.

URI IIASKIN.

\Vitnesses:

J. K. SMITH, JAMES I1. IoR'rn.

